Remote controlled mechanically operated sash lock



April 3, 1934; G, ZMMER 1,953,737

REMOTE CONTROLLED MEGHANICALLY OPERATED SASH LOCK Filed March 25, 1933 INVENTOR Patented Apr. 3, 1934 PATENToFFICE REMOTE CONTROLLED MECHANICALLY OPERATED SASH LOCK George Zimmer, Buffalo, N. Y.

Application March 25, 1933, Serial No. 662,669

4 Claims.

This invention relates to sash locks, and is herein illustrated as embodied in a sash lock adapted to be operated manually from a distance, as by cords, thus facilitating the operating of .5 windows in churches, schools, and other buildings having high windows.

In the accompanying drawing,

Figure 1 is a plan view showing the lock or latch mounted on the sash of a window.

Figure 2 is an end view of the same.

Figure 3 is a sectional view on the line 3-3 of Figure 1.

Figure 4 is a plan view of the base, partly broken away.

Figure 5 is a plan view of the latch bolt showing the tongue.

Figure 6 is an end view of part of the turning pulley.

Figure 7 is a side View of the pinion for turning the latch bolt.

Figure 3 is a face view of a lever adapted to be substituted for the pulley.

The sash lock illustrated includes a base 1, adapted to be held by screws 21 to the top bar 22 of a window sash, and forming a hollow mounting for a rotatable latch bolt 2.

To turn the latch bolt 2 to locking position, one end of a rope 6 is pulled, thereby revolving the pulley or niggerhead around which the rope 6 :34) is wrapped for a full turn, and to which the rope 6 is attached, centrally of the turns at 7, as by soldering or welding if the rope is stranded wire.

As the pulley 5 turns, it turns the shaft 3, to which itis attached, and thereby turns the pinion gear i on the shaft at the opposite side of the separate bearing member 19.

When the pinion gear 4 turns, it turns the latch bolt 2, because it meshes with a gear or annular rack on the bottom of the latch bolt 2 extending 135 around the latch bolt 2, so that its end stops the latch bolt 2 at the end 120. The latch bolt turns around the short central machine screw 18 which is threaded into a boss or central bearing projection 9 of the base 1 and holds the latch bolt 2 on its base 1. The latch bolt 2 usually turns until it engages with the strike 15 on the other sash of the window, locking the sash. If it is turned when the strike 15 is not in place, the latch bolt 2 is prevented from overthrow because the teeth of the pinion gear hit the latch beyond the end of the annular rack 20.

The strike may be provided with an enlarged base, including a cross bar 16 along the edge of the sash, and a boss 23 at the back. To steady the latch bolt as it turns, and to hold it against being tilted by the strike 15, it is guided by an annular tongue 11 near its bottom, extending from one end for about 125, as indicated in dotted lines, and turning in an annular groove 10 in the internal face of the base 1. Thus any thrust of the parts is taken by the boss 9, the tongue 11 and groove 10.

To permit the parts to be readily assembled, the pinion gear is shown as loose on the shaft 3, and as engaging corrugations or burrs 14 on the shaft to be turned by it. In assembling, the pinion 4 is placed in the base 1, the center of the latch bolt 2 laid on the base with the upper part swung around so the end of the tongue 11 can enter the groove 10, and then turned on its pivot until the rack on its bottom properly engages the pinion 4. Then the screw 18 screwed down. Then the shaft 3 is passed through the bearing member 19 and into the hollow center of the pinion, carrying a bushing 13, and extending beyond the pinion. The bushing is then pushed into the opening in the base 1 provided for it, thus centering the shaft.

The separate bearing member 19 is adapted to be held to the sash bar 22 near its edges by suitable screws, thus supporting the shaft 3 near its pulley 5.

If it is desired to avoid the use of a rope 6, there may be substituted a lever 17, shown as provided with two loops 24, 25, and adapted to be keyed to the shaft 3, so that by pulling down one loop or the other the latch may be locked or unlocked.

When a rope is used to turn the latch its ends may pass through guide openings in a hood 8 resting on and partly embracing the pulley 5.

Having thus described one embodiment of the invention, what is claimed is:

1. A window lock including a base, a rotatable latch bolt pivoted to revolve in a hollow of the base, an annular tongue on the latch fitting within an annular groove in the base, an annular rack on the bottom of the latch, a pinion meshing with the rack to turn the latch, a shaft for the pinion, and a device for turning the shaft to turn the pinion.

2. A window lock including a base, a rotatable latch bolt adapted to revolve on the base, a boss on the base around which it is revolvable, an annular tongue on the latch adapted to fit in an annular groove in the base, a pivot holding the latch on its boss, an annular rack around the base of the latch, a pinion meshing with the rack to turn the latch, a shaft for the pinion, and a device for turning the shaft to turn the pinion.

latch bolt adapted to revolve on the base, a pinion in the base, a rack on the latch meshing with the pinion to be turned by it, a shaft for turning the pinion, a removable journal member in the base forming a bearing for the pinion shaft, a second bearing member for the shaft behind the base, and a pulley on the shaft behind the second bearing member for turning it.

GEORGE ZIMMER. 

